If you're looking for something more Deplhi-like, why don't you just use .NET? Mostly open source now, tons of 3rd party libraries and component packages available for it, just like Delphi in its glory days.
Plus I want it to have a tiny memory/CPU footprint and while .NET/WPF is better than the average Electron app I still notice a difference.
EDIT: Just saw your second addition... not so sure I'd agree though, the performance on startup of .NET applications these days is quite excellent and I haven't been able to tell for years, but I've been on SSDs with lots of RAM on recent chips I suppose.
I'm probably ending up with prototyping in Racket and writing the final application in Qt or Lazarus.
TP and Delphi, obviously, require no apologies.
And C++ powers Google, Facebook, 100% of AAA games, 90% of mainstream OSes, and 90% of all top-of-the-line commercial programs (from browsers and office apps, to Photoshop and AutoCAD).
Nothing to apologize about RoR either.
And yes, the language itself is a joy to code in. Which is opinion, not fact, I realize that.
No need to apology for them.